Vidikron Vision 30 manual Enter

On-Screen Display Menus

White Balance

Gamma Selection

Gain: Use the Gain controls in the White Balance sub-menu to correct color imbalances in the bright areas of the image. A good way to do this is to use a test pattern consisting mostly of solid white areas, such as an 80 IRE “window” pattern. If the white areas contain traces of red, green or blue, decrease the Gain for that color.

Offset: Use the Offset controls in the White Balance sub-menu to correct color imbalances in the dark areas of the image. A good way to do this is to use a test pattern consisting mostly of dark gray areas, such as a 30 IRE “window” pattern. If the gray areas contain traces of red, green or blue, decrease the Offset for that color.

Gamma: “Gamma” is a global setting that determines how gray shades are displayed between minimum input (black) and maximum input (white) for all signals. A good gamma setting helps to optimize blacks and whites while ensuring smooth transitions for the “in- between” values utilized in other grays. Unlike “Brightness” and “Contrast” controls, the overall tone of your images can be lightened or darkened without changing the extremes and all images will be more vibrant while still showing good detail in dark areas when using the “Gamma” control.

In all but the most unusual situations, the appropriate “Gamma Selection” (see below) will produce accurate colors and a satisfying contrast level. However, it is sometimes necessary to adjust the red, blue and green gamma curves individually. To do this, select Gamma from the White Balance sub-menu and use the left- and right-arrow buttons to manipulate the on-screen slidebars.

Save Color Temp.4/Save Color Temp.5: When you are finished adjusting the Gamma, Gain and Offset, select Save Color Temp.4 or Save Color Temp.5 to store your settings. To recall them, set the Color Temperature to +4 or +5 in the Picture Adjust menu (refer to “Picture Quality Adjustments,” earlier in this section).

The default gamma setting of 2.2 is correct for almost all signals and conditions. If excess ambient light washes out the image and it becomes difficult or impossible to see details in dark areas, lower the gamma setting to compensate. This will improve contrast while maintaining good details for blacks. Conversely, if the image is washed out and unnatural, with excessive detail in black areas, increase the setting. Again, good gamma improves contrast while maintaining good details for blacks and whites.

ICC Adjust Use the ICC Adjust controls to customize the stored NTSC, HDTV and/or PAL color select characteristics. To do this, select the color select to modify. Then, select a component color (Red, Green, Blue, Yellow, Cyan or Magenta).

For each component color, you can adjust the following:

Intensity: This slidebar adjusts the intensity -- also known as luminance -- of a given color.

Sat.: This slidebar adjusts the color saturation level -- the amount of that color in a video image. Lower settings produce less saturated colors; a setting of “0” removes that color from the image entirely. If the saturation is too high, that color will be overpowering and unrealistic.

Hue: This slidebar adjusts the red/green color hue for true color reproduction of video signals. For best results, adjust tint while displaying an external color bars test pattern. Otherwise, it is recommended that Hue remain at its default setting.

When you have finished customizing the color select, select Store Setting and press

ENTER.

42 Vidikron Vision Model 30 Owner’s Operating Manual